./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa1b7e3020c9e54f93d45078f4a249ca3b737cc17c725ce83b71e2a4a5a42766 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:52:30,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:52:30,426 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:52:30,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:52:30,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:52:30,456 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:52:30,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:52:30,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:52:30,458 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:52:30,459 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:52:30,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:52:30,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:52:30,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:52:30,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:52:30,461 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:52:30,462 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:52:30,462 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:52:30,463 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:52:30,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:52:30,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:52:30,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:52:30,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:52:30,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:52:30,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:52:30,466 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:52:30,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:52:30,467 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:52:30,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:52:30,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:52:30,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:52:30,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:52:30,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:52:30,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:52:30,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:52:30,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:52:30,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:52:30,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:52:30,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:52:30,471 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:52:30,472 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:52:30,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:52:30,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:52:30,472 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa1b7e3020c9e54f93d45078f4a249ca3b737cc17c725ce83b71e2a4a5a42766 [2023-11-29 06:52:30,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:52:30,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:52:30,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:52:30,712 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:52:30,713 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:52:30,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-29 06:52:33,465 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:52:33,633 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:52:33,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-29 06:52:33,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/data/4f9bc40fc/182a4e5a5a534ed2817fec1184e44682/FLAG6d73f8e63 [2023-11-29 06:52:33,654 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/data/4f9bc40fc/182a4e5a5a534ed2817fec1184e44682 [2023-11-29 06:52:33,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:52:33,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:52:33,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:33,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:52:33,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:52:33,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:33,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30df4361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33, skipping insertion in model container [2023-11-29 06:52:33,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:33,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:52:33,815 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i[915,928] [2023-11-29 06:52:33,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:33,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:52:33,890 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-34.i[915,928] [2023-11-29 06:52:33,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:33,937 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:52:33,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33 WrapperNode [2023-11-29 06:52:33,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:33,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:33,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:52:33,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:52:33,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:33,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:33,992 INFO L138 Inliner]: procedures = 26, calls = 26, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 177 [2023-11-29 06:52:33,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:33,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:52:33,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:52:33,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:52:34,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,010 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,027 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:52:34,027 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:52:34,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:52:34,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:52:34,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:52:34,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (1/1) ... [2023-11-29 06:52:34,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:52:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:34,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:52:34,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:52:34,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:52:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:52:34,121 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:52:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:52:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:52:34,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:52:34,194 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:52:34,196 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:52:34,660 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:52:34,698 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:52:34,699 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:52:34,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:34 BoogieIcfgContainer [2023-11-29 06:52:34,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:52:34,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:52:34,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:52:34,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:52:34,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:52:33" (1/3) ... [2023-11-29 06:52:34,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e328e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:34, skipping insertion in model container [2023-11-29 06:52:34,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:33" (2/3) ... [2023-11-29 06:52:34,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e328e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:34, skipping insertion in model container [2023-11-29 06:52:34,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:34" (3/3) ... [2023-11-29 06:52:34,708 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-1loop_file-34.i [2023-11-29 06:52:34,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:52:34,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:52:34,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:52:34,786 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@14405244, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:52:34,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:52:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 45 states have (on average 1.6) internal successors, (72), 46 states have internal predecessors, (72), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:52:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 06:52:34,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:34,803 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:34,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:34,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash 310197264, now seen corresponding path program 1 times [2023-11-29 06:52:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847165899] [2023-11-29 06:52:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847165899] [2023-11-29 06:52:34,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:52:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091615586] [2023-11-29 06:52:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:34,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:35,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:52:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:35,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:52:35,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-29 06:52:35,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091615586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:35,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:35,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486873144] [2023-11-29 06:52:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:35,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:52:35,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:52:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:52:35,209 INFO L87 Difference]: Start difference. First operand has 61 states, 45 states have (on average 1.6) internal successors, (72), 46 states have internal predecessors, (72), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 06:52:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:35,248 INFO L93 Difference]: Finished difference Result 121 states and 208 transitions. [2023-11-29 06:52:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:52:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 90 [2023-11-29 06:52:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:35,259 INFO L225 Difference]: With dead ends: 121 [2023-11-29 06:52:35,259 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 06:52:35,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:52:35,265 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:35,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 06:52:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-29 06:52:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:52:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 93 transitions. [2023-11-29 06:52:35,309 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 93 transitions. Word has length 90 [2023-11-29 06:52:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:35,310 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 93 transitions. [2023-11-29 06:52:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 06:52:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 93 transitions. [2023-11-29 06:52:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 06:52:35,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:35,315 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:35,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:35,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:35,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash -663754418, now seen corresponding path program 1 times [2023-11-29 06:52:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380645359] [2023-11-29 06:52:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:35,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:35,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234767572] [2023-11-29 06:52:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:35,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:35,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:52:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:35,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:52:35,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:52:35,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:35,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:35,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380645359] [2023-11-29 06:52:35,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:35,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234767572] [2023-11-29 06:52:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234767572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:35,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:35,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:52:35,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928200251] [2023-11-29 06:52:35,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:35,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:52:35,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:52:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:35,854 INFO L87 Difference]: Start difference. First operand 59 states and 93 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:52:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:36,072 INFO L93 Difference]: Finished difference Result 176 states and 276 transitions. [2023-11-29 06:52:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 90 [2023-11-29 06:52:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:36,075 INFO L225 Difference]: With dead ends: 176 [2023-11-29 06:52:36,076 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 06:52:36,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:52:36,078 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 117 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:36,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 359 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:52:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 06:52:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 61. [2023-11-29 06:52:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:52:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 95 transitions. [2023-11-29 06:52:36,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 95 transitions. Word has length 90 [2023-11-29 06:52:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:36,098 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 95 transitions. [2023-11-29 06:52:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:52:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 95 transitions. [2023-11-29 06:52:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 06:52:36,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:36,102 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:36,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:52:36,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:36,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:36,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1968835048, now seen corresponding path program 1 times [2023-11-29 06:52:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:36,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205815150] [2023-11-29 06:52:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:36,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:36,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085608711] [2023-11-29 06:52:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:36,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:36,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:36,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:52:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:36,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:52:36,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 06:52:36,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:52:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205815150] [2023-11-29 06:52:37,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085608711] [2023-11-29 06:52:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085608711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:37,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:37,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 06:52:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545616956] [2023-11-29 06:52:37,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:37,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:37,009 INFO L87 Difference]: Start difference. First operand 61 states and 95 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 06:52:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:37,508 INFO L93 Difference]: Finished difference Result 231 states and 352 transitions. [2023-11-29 06:52:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:52:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 91 [2023-11-29 06:52:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:37,512 INFO L225 Difference]: With dead ends: 231 [2023-11-29 06:52:37,512 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 06:52:37,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:52:37,515 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 398 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:37,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 325 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:52:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 06:52:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 119. [2023-11-29 06:52:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.4719101123595506) internal successors, (131), 89 states have internal predecessors, (131), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-29 06:52:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 183 transitions. [2023-11-29 06:52:37,542 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 183 transitions. Word has length 91 [2023-11-29 06:52:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:37,543 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 183 transitions. [2023-11-29 06:52:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 06:52:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 183 transitions. [2023-11-29 06:52:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 06:52:37,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:37,546 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:37,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:52:37,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:37,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:37,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 347239097, now seen corresponding path program 1 times [2023-11-29 06:52:37,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:37,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131502617] [2023-11-29 06:52:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:37,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:37,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832875788] [2023-11-29 06:52:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:37,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:37,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:37,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:37,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:52:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:37,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:52:37,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:52:37,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131502617] [2023-11-29 06:52:37,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832875788] [2023-11-29 06:52:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832875788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:52:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976153181] [2023-11-29 06:52:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:52:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:52:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:38,002 INFO L87 Difference]: Start difference. First operand 119 states and 183 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:52:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:38,124 INFO L93 Difference]: Finished difference Result 407 states and 626 transitions. [2023-11-29 06:52:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:52:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 91 [2023-11-29 06:52:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:38,128 INFO L225 Difference]: With dead ends: 407 [2023-11-29 06:52:38,129 INFO L226 Difference]: Without dead ends: 289 [2023-11-29 06:52:38,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:38,131 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:38,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 291 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-29 06:52:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 239. [2023-11-29 06:52:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 180 states have (on average 1.4555555555555555) internal successors, (262), 180 states have internal predecessors, (262), 52 states have call successors, (52), 6 states have call predecessors, (52), 6 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 06:52:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 366 transitions. [2023-11-29 06:52:38,180 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 366 transitions. Word has length 91 [2023-11-29 06:52:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:38,180 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 366 transitions. [2023-11-29 06:52:38,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:52:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 366 transitions. [2023-11-29 06:52:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:52:38,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:38,183 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:38,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:52:38,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:38,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2000049611, now seen corresponding path program 1 times [2023-11-29 06:52:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924367930] [2023-11-29 06:52:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:38,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:38,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620897751] [2023-11-29 06:52:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:38,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:38,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:38,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:52:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:38,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 06:52:38,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 198 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 06:52:39,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:52:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:45,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924367930] [2023-11-29 06:52:45,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:52:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620897751] [2023-11-29 06:52:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620897751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:45,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-29 06:52:45,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232163942] [2023-11-29 06:52:45,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:45,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:52:45,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:45,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:52:45,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:52:45,084 INFO L87 Difference]: Start difference. First operand 239 states and 366 transitions. Second operand has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-29 06:52:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:58,254 INFO L93 Difference]: Finished difference Result 1538 states and 2269 transitions. [2023-11-29 06:52:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 06:52:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 92 [2023-11-29 06:52:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:58,264 INFO L225 Difference]: With dead ends: 1538 [2023-11-29 06:52:58,264 INFO L226 Difference]: Without dead ends: 1300 [2023-11-29 06:52:58,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2147, Invalid=8773, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 06:52:58,270 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1453 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:58,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 855 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 06:52:58,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2023-11-29 06:52:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 626. [2023-11-29 06:52:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 502 states have (on average 1.4223107569721116) internal successors, (714), 504 states have internal predecessors, (714), 105 states have call successors, (105), 18 states have call predecessors, (105), 18 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-29 06:52:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 924 transitions. [2023-11-29 06:52:58,400 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 924 transitions. Word has length 92 [2023-11-29 06:52:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 924 transitions. [2023-11-29 06:52:58,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-29 06:52:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 924 transitions. [2023-11-29 06:52:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:52:58,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:58,403 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:58,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:52:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:58,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:58,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash 673321734, now seen corresponding path program 1 times [2023-11-29 06:52:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:58,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359332386] [2023-11-29 06:52:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:58,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987924920] [2023-11-29 06:52:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:58,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:58,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:52:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:59,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:52:59,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 06:53:02,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:53:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359332386] [2023-11-29 06:53:09,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987924920] [2023-11-29 06:53:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987924920] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:53:09,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:53:09,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2023-11-29 06:53:09,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893538088] [2023-11-29 06:53:09,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:53:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:53:09,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:53:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:53:09,335 INFO L87 Difference]: Start difference. First operand 626 states and 924 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:16,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 06:53:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:27,944 INFO L93 Difference]: Finished difference Result 1116 states and 1626 transitions. [2023-11-29 06:53:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:53:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 06:53:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:27,952 INFO L225 Difference]: With dead ends: 1116 [2023-11-29 06:53:27,952 INFO L226 Difference]: Without dead ends: 870 [2023-11-29 06:53:27,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:53:27,954 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 250 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:27,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 426 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 341 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2023-11-29 06:53:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-29 06:53:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 700. [2023-11-29 06:53:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 568 states have (on average 1.4014084507042253) internal successors, (796), 570 states have internal predecessors, (796), 105 states have call successors, (105), 26 states have call predecessors, (105), 26 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-29 06:53:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1006 transitions. [2023-11-29 06:53:28,079 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1006 transitions. Word has length 92 [2023-11-29 06:53:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:53:28,079 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1006 transitions. [2023-11-29 06:53:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1006 transitions. [2023-11-29 06:53:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:53:28,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:53:28,081 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:28,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:53:28,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:53:28,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:53:28,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash 730580036, now seen corresponding path program 1 times [2023-11-29 06:53:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:53:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363648446] [2023-11-29 06:53:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:53:28,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:53:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140401404] [2023-11-29 06:53:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:28,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:53:28,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:53:28,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:53:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:53:28,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:53:28,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:53:33,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:53:33,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363648446] [2023-11-29 06:53:33,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140401404] [2023-11-29 06:53:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140401404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:53:33,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:53:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:53:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213074653] [2023-11-29 06:53:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:53:33,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:53:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:53:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:53:33,212 INFO L87 Difference]: Start difference. First operand 700 states and 1006 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:39,068 INFO L93 Difference]: Finished difference Result 1583 states and 2296 transitions. [2023-11-29 06:53:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:53:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 06:53:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:39,076 INFO L225 Difference]: With dead ends: 1583 [2023-11-29 06:53:39,076 INFO L226 Difference]: Without dead ends: 1370 [2023-11-29 06:53:39,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:53:39,078 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 329 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:39,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 602 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 06:53:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2023-11-29 06:53:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1269. [2023-11-29 06:53:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1025 states have (on average 1.4) internal successors, (1435), 1027 states have internal predecessors, (1435), 196 states have call successors, (196), 47 states have call predecessors, (196), 47 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 06:53:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1827 transitions. [2023-11-29 06:53:39,339 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1827 transitions. Word has length 92 [2023-11-29 06:53:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:53:39,339 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1827 transitions. [2023-11-29 06:53:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1827 transitions. [2023-11-29 06:53:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:53:39,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:53:39,342 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:39,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:53:39,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:53:39,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:53:39,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash -136024892, now seen corresponding path program 1 times [2023-11-29 06:53:39,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:53:39,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863295393] [2023-11-29 06:53:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:39,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:53:39,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:53:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327542600] [2023-11-29 06:53:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:53:39,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:53:39,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:53:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:53:40,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:53:40,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 96 proven. 30 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-29 06:53:40,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863295393] [2023-11-29 06:53:46,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327542600] [2023-11-29 06:53:46,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327542600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:53:46,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:53:46,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 06:53:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599206907] [2023-11-29 06:53:46,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:53:46,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:53:46,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:53:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:53:46,421 INFO L87 Difference]: Start difference. First operand 1269 states and 1827 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 06:53:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:47,575 INFO L93 Difference]: Finished difference Result 2083 states and 2971 transitions. [2023-11-29 06:53:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:53:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2023-11-29 06:53:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:47,584 INFO L225 Difference]: With dead ends: 2083 [2023-11-29 06:53:47,584 INFO L226 Difference]: Without dead ends: 1377 [2023-11-29 06:53:47,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:53:47,587 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 360 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:47,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 372 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:53:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2023-11-29 06:53:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1257. [2023-11-29 06:53:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1013 states have (on average 1.3938795656465943) internal successors, (1412), 1015 states have internal predecessors, (1412), 196 states have call successors, (196), 47 states have call predecessors, (196), 47 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 06:53:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1804 transitions. [2023-11-29 06:53:47,855 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1804 transitions. Word has length 92 [2023-11-29 06:53:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:53:47,856 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1804 transitions. [2023-11-29 06:53:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 06:53:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1804 transitions. [2023-11-29 06:53:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:53:47,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:53:47,858 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:47,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:53:48,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:48,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:53:48,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 86515720, now seen corresponding path program 1 times [2023-11-29 06:53:48,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:53:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023753999] [2023-11-29 06:53:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:53:48,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:53:48,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533261359] [2023-11-29 06:53:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:48,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:53:48,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:53:48,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:53:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:53:48,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:53:48,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:53:49,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:53:49,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023753999] [2023-11-29 06:53:49,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533261359] [2023-11-29 06:53:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533261359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:53:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:53:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:53:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447305900] [2023-11-29 06:53:49,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:53:49,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:53:49,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:53:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:53:49,015 INFO L87 Difference]: Start difference. First operand 1257 states and 1804 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:49,443 INFO L93 Difference]: Finished difference Result 1747 states and 2536 transitions. [2023-11-29 06:53:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:53:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 06:53:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:49,449 INFO L225 Difference]: With dead ends: 1747 [2023-11-29 06:53:49,449 INFO L226 Difference]: Without dead ends: 1007 [2023-11-29 06:53:49,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:53:49,450 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 63 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:49,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 210 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:53:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2023-11-29 06:53:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 963. [2023-11-29 06:53:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 767 states have (on average 1.376792698826597) internal successors, (1056), 769 states have internal predecessors, (1056), 157 states have call successors, (157), 38 states have call predecessors, (157), 38 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:53:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1370 transitions. [2023-11-29 06:53:49,761 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1370 transitions. Word has length 92 [2023-11-29 06:53:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:53:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1370 transitions. [2023-11-29 06:53:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:53:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1370 transitions. [2023-11-29 06:53:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 06:53:49,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:53:49,763 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:49,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:53:49,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:49,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:53:49,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2010443714, now seen corresponding path program 1 times [2023-11-29 06:53:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:53:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015979523] [2023-11-29 06:53:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:49,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:53:49,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:53:49,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440136800] [2023-11-29 06:53:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:49,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:53:49,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:53:49,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:53:49,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:53:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:53:50,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:53:50,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:53:55,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:53:55,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015979523] [2023-11-29 06:53:55,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440136800] [2023-11-29 06:53:55,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440136800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:53:55,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:53:55,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:53:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357467527] [2023-11-29 06:53:55,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:53:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:53:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:53:55,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:53:55,425 INFO L87 Difference]: Start difference. First operand 963 states and 1370 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:03,364 INFO L93 Difference]: Finished difference Result 1652 states and 2396 transitions. [2023-11-29 06:54:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:54:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 92 [2023-11-29 06:54:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:03,370 INFO L225 Difference]: With dead ends: 1652 [2023-11-29 06:54:03,370 INFO L226 Difference]: Without dead ends: 1120 [2023-11-29 06:54:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:54:03,373 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 288 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:03,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 589 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 06:54:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2023-11-29 06:54:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 965. [2023-11-29 06:54:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 769 states have (on average 1.3758127438231469) internal successors, (1058), 771 states have internal predecessors, (1058), 157 states have call successors, (157), 38 states have call predecessors, (157), 38 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:54:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1372 transitions. [2023-11-29 06:54:03,609 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1372 transitions. Word has length 92 [2023-11-29 06:54:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:03,609 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1372 transitions. [2023-11-29 06:54:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1372 transitions. [2023-11-29 06:54:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:03,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:03,611 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:03,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:54:03,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:54:03,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:03,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2010816308, now seen corresponding path program 1 times [2023-11-29 06:54:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:03,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309402008] [2023-11-29 06:54:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:03,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:03,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:03,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369375913] [2023-11-29 06:54:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:03,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:03,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:03,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:03,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:54:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:04,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:54:04,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:05,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309402008] [2023-11-29 06:54:05,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369375913] [2023-11-29 06:54:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369375913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:05,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:05,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:54:05,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089879109] [2023-11-29 06:54:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:54:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:54:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:54:05,724 INFO L87 Difference]: Start difference. First operand 965 states and 1372 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:06,690 INFO L93 Difference]: Finished difference Result 1400 states and 2004 transitions. [2023-11-29 06:54:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:54:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:06,696 INFO L225 Difference]: With dead ends: 1400 [2023-11-29 06:54:06,696 INFO L226 Difference]: Without dead ends: 1279 [2023-11-29 06:54:06,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:54:06,697 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 238 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:06,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 407 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:54:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-11-29 06:54:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1177. [2023-11-29 06:54:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 940 states have (on average 1.3787234042553191) internal successors, (1296), 943 states have internal predecessors, (1296), 190 states have call successors, (190), 46 states have call predecessors, (190), 46 states have return successors, (190), 187 states have call predecessors, (190), 190 states have call successors, (190) [2023-11-29 06:54:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1676 transitions. [2023-11-29 06:54:07,000 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1676 transitions. Word has length 93 [2023-11-29 06:54:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:07,001 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1676 transitions. [2023-11-29 06:54:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1676 transitions. [2023-11-29 06:54:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:07,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:07,003 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:07,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 06:54:07,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:54:07,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1953558006, now seen corresponding path program 1 times [2023-11-29 06:54:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533120518] [2023-11-29 06:54:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:07,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:07,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:07,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823644495] [2023-11-29 06:54:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:07,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:07,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:07,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:54:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:07,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:54:07,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:08,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533120518] [2023-11-29 06:54:08,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823644495] [2023-11-29 06:54:08,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823644495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:08,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:08,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:54:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512686867] [2023-11-29 06:54:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:54:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:54:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:54:08,756 INFO L87 Difference]: Start difference. First operand 1177 states and 1676 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:10,807 INFO L93 Difference]: Finished difference Result 1852 states and 2679 transitions. [2023-11-29 06:54:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:54:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:10,815 INFO L225 Difference]: With dead ends: 1852 [2023-11-29 06:54:10,815 INFO L226 Difference]: Without dead ends: 1566 [2023-11-29 06:54:10,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:54:10,816 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 494 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:10,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 772 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:54:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2023-11-29 06:54:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1367. [2023-11-29 06:54:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1100 states have (on average 1.39) internal successors, (1529), 1103 states have internal predecessors, (1529), 216 states have call successors, (216), 50 states have call predecessors, (216), 50 states have return successors, (216), 213 states have call predecessors, (216), 216 states have call successors, (216) [2023-11-29 06:54:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1961 transitions. [2023-11-29 06:54:11,079 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1961 transitions. Word has length 93 [2023-11-29 06:54:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:11,080 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 1961 transitions. [2023-11-29 06:54:11,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1961 transitions. [2023-11-29 06:54:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:11,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:11,081 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:11,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:54:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:54:11,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:11,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -989747954, now seen corresponding path program 1 times [2023-11-29 06:54:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:11,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348918939] [2023-11-29 06:54:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:11,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:11,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628341640] [2023-11-29 06:54:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:11,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:11,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:54:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:11,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:54:11,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-29 06:54:11,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:54:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:11,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348918939] [2023-11-29 06:54:11,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:11,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628341640] [2023-11-29 06:54:11,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628341640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:54:11,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:54:11,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 06:54:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377048348] [2023-11-29 06:54:11,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:54:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:54:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:54:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:54:11,673 INFO L87 Difference]: Start difference. First operand 1367 states and 1961 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 06:54:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:12,148 INFO L93 Difference]: Finished difference Result 1759 states and 2494 transitions. [2023-11-29 06:54:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:54:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-29 06:54:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:12,154 INFO L225 Difference]: With dead ends: 1759 [2023-11-29 06:54:12,154 INFO L226 Difference]: Without dead ends: 1023 [2023-11-29 06:54:12,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:54:12,157 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 248 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:12,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 337 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:54:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-11-29 06:54:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 957. [2023-11-29 06:54:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 768 states have (on average 1.3567708333333333) internal successors, (1042), 770 states have internal predecessors, (1042), 144 states have call successors, (144), 44 states have call predecessors, (144), 44 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 06:54:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1330 transitions. [2023-11-29 06:54:12,380 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1330 transitions. Word has length 93 [2023-11-29 06:54:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:12,380 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1330 transitions. [2023-11-29 06:54:12,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 06:54:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1330 transitions. [2023-11-29 06:54:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:12,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:12,383 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:12,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:54:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:54:12,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1716871440, now seen corresponding path program 1 times [2023-11-29 06:54:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139335081] [2023-11-29 06:54:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:12,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:12,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032348705] [2023-11-29 06:54:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:12,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:12,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:12,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:54:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:13,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:54:13,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 06:54:15,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139335081] [2023-11-29 06:54:17,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:17,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032348705] [2023-11-29 06:54:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032348705] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:54:17,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:54:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [19] total 24 [2023-11-29 06:54:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954171179] [2023-11-29 06:54:17,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:17,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:54:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:54:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:54:17,079 INFO L87 Difference]: Start difference. First operand 957 states and 1330 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:18,040 INFO L93 Difference]: Finished difference Result 1392 states and 1964 transitions. [2023-11-29 06:54:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:54:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:18,045 INFO L225 Difference]: With dead ends: 1392 [2023-11-29 06:54:18,045 INFO L226 Difference]: Without dead ends: 1161 [2023-11-29 06:54:18,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:54:18,046 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:18,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 315 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:54:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2023-11-29 06:54:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 959. [2023-11-29 06:54:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 770 states have (on average 1.3558441558441559) internal successors, (1044), 772 states have internal predecessors, (1044), 144 states have call successors, (144), 44 states have call predecessors, (144), 44 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 06:54:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1332 transitions. [2023-11-29 06:54:18,226 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1332 transitions. Word has length 93 [2023-11-29 06:54:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:18,226 INFO L495 AbstractCegarLoop]: Abstraction has 959 states and 1332 transitions. [2023-11-29 06:54:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1332 transitions. [2023-11-29 06:54:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:18,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:18,228 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:18,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:54:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:54:18,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:18,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1774129742, now seen corresponding path program 1 times [2023-11-29 06:54:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:18,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624400853] [2023-11-29 06:54:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:18,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:18,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394395320] [2023-11-29 06:54:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:18,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:18,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:18,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:54:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:18,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:54:18,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:20,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:20,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624400853] [2023-11-29 06:54:20,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394395320] [2023-11-29 06:54:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394395320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:20,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:20,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:54:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485261475] [2023-11-29 06:54:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:20,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:54:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:54:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:54:20,077 INFO L87 Difference]: Start difference. First operand 959 states and 1332 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:22,079 INFO L93 Difference]: Finished difference Result 1665 states and 2350 transitions. [2023-11-29 06:54:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:54:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:22,085 INFO L225 Difference]: With dead ends: 1665 [2023-11-29 06:54:22,085 INFO L226 Difference]: Without dead ends: 1363 [2023-11-29 06:54:22,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:54:22,086 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 433 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:22,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 664 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:54:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2023-11-29 06:54:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1076. [2023-11-29 06:54:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 871 states have (on average 1.3605051664753158) internal successors, (1185), 873 states have internal predecessors, (1185), 157 states have call successors, (157), 47 states have call predecessors, (157), 47 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:54:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1499 transitions. [2023-11-29 06:54:22,293 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1499 transitions. Word has length 93 [2023-11-29 06:54:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:22,293 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1499 transitions. [2023-11-29 06:54:22,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1499 transitions. [2023-11-29 06:54:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:22,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:22,294 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:22,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:54:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:54:22,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:22,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash 706623932, now seen corresponding path program 1 times [2023-11-29 06:54:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:22,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544991934] [2023-11-29 06:54:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:22,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:22,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621229818] [2023-11-29 06:54:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:22,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:22,509 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:22,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:54:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:22,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:54:22,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:24,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:24,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:24,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544991934] [2023-11-29 06:54:24,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:24,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621229818] [2023-11-29 06:54:24,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621229818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:24,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:24,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:54:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012720918] [2023-11-29 06:54:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:24,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:54:24,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:54:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:54:24,267 INFO L87 Difference]: Start difference. First operand 1076 states and 1499 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:26,328 INFO L93 Difference]: Finished difference Result 1814 states and 2564 transitions. [2023-11-29 06:54:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:54:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:26,333 INFO L225 Difference]: With dead ends: 1814 [2023-11-29 06:54:26,333 INFO L226 Difference]: Without dead ends: 1192 [2023-11-29 06:54:26,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:54:26,334 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 173 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:26,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 383 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 06:54:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2023-11-29 06:54:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1096. [2023-11-29 06:54:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 891 states have (on average 1.3546576879910213) internal successors, (1207), 893 states have internal predecessors, (1207), 157 states have call successors, (157), 47 states have call predecessors, (157), 47 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:54:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1521 transitions. [2023-11-29 06:54:26,532 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1521 transitions. Word has length 93 [2023-11-29 06:54:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:26,532 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1521 transitions. [2023-11-29 06:54:26,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1521 transitions. [2023-11-29 06:54:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:26,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:26,533 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:26,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:54:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:54:26,734 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:26,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 763882234, now seen corresponding path program 1 times [2023-11-29 06:54:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:26,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57513849] [2023-11-29 06:54:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:26,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:26,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452474849] [2023-11-29 06:54:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:26,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:26,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:26,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:54:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:26,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:54:26,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:31,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:31,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57513849] [2023-11-29 06:54:31,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452474849] [2023-11-29 06:54:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452474849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:31,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:31,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:54:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114601211] [2023-11-29 06:54:31,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:54:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:31,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:54:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:54:31,823 INFO L87 Difference]: Start difference. First operand 1096 states and 1521 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:41,192 INFO L93 Difference]: Finished difference Result 1456 states and 2050 transitions. [2023-11-29 06:54:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:54:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:41,197 INFO L225 Difference]: With dead ends: 1456 [2023-11-29 06:54:41,197 INFO L226 Difference]: Without dead ends: 1158 [2023-11-29 06:54:41,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:54:41,199 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 287 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:41,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 720 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 06:54:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-11-29 06:54:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1098. [2023-11-29 06:54:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 893 states have (on average 1.3538633818589025) internal successors, (1209), 895 states have internal predecessors, (1209), 157 states have call successors, (157), 47 states have call predecessors, (157), 47 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:54:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1523 transitions. [2023-11-29 06:54:41,460 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1523 transitions. Word has length 93 [2023-11-29 06:54:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:41,460 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 1523 transitions. [2023-11-29 06:54:41,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1523 transitions. [2023-11-29 06:54:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 06:54:41,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:41,462 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:41,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:54:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:54:41,662 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:41,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1022677558, now seen corresponding path program 1 times [2023-11-29 06:54:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770045333] [2023-11-29 06:54:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:41,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462464354] [2023-11-29 06:54:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:41,674 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:41,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:54:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:41,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:54:41,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:46,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770045333] [2023-11-29 06:54:46,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462464354] [2023-11-29 06:54:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462464354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:46,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:54:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107286451] [2023-11-29 06:54:46,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:54:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:54:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:54:46,694 INFO L87 Difference]: Start difference. First operand 1098 states and 1523 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:53,778 INFO L93 Difference]: Finished difference Result 1762 states and 2495 transitions. [2023-11-29 06:54:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:54:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 93 [2023-11-29 06:54:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:53,783 INFO L225 Difference]: With dead ends: 1762 [2023-11-29 06:54:53,783 INFO L226 Difference]: Without dead ends: 1158 [2023-11-29 06:54:53,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:54:53,784 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 283 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:53,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 523 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 06:54:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-11-29 06:54:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1100. [2023-11-29 06:54:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 895 states have (on average 1.353072625698324) internal successors, (1211), 897 states have internal predecessors, (1211), 157 states have call successors, (157), 47 states have call predecessors, (157), 47 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:54:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1525 transitions. [2023-11-29 06:54:53,977 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1525 transitions. Word has length 93 [2023-11-29 06:54:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:53,978 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1525 transitions. [2023-11-29 06:54:53,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:54:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1525 transitions. [2023-11-29 06:54:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 06:54:53,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:53,979 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:53,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:54:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:54:54,180 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:54,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1595251769, now seen corresponding path program 1 times [2023-11-29 06:54:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047505392] [2023-11-29 06:54:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:54,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:54,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621408972] [2023-11-29 06:54:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:54,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:54,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:54,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:54:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:54,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:54:54,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:54:58,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:58,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047505392] [2023-11-29 06:54:58,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621408972] [2023-11-29 06:54:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621408972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:58,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:58,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:54:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051912230] [2023-11-29 06:54:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:54:58,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:54:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:54:58,703 INFO L87 Difference]: Start difference. First operand 1100 states and 1525 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:08,495 INFO L93 Difference]: Finished difference Result 1640 states and 2293 transitions. [2023-11-29 06:55:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:55:08,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-29 06:55:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:08,500 INFO L225 Difference]: With dead ends: 1640 [2023-11-29 06:55:08,500 INFO L226 Difference]: Without dead ends: 1383 [2023-11-29 06:55:08,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:55:08,502 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 463 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:08,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 785 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 06:55:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2023-11-29 06:55:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1111. [2023-11-29 06:55:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 906 states have (on average 1.3554083885209713) internal successors, (1228), 908 states have internal predecessors, (1228), 157 states have call successors, (157), 47 states have call predecessors, (157), 47 states have return successors, (157), 155 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-29 06:55:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1542 transitions. [2023-11-29 06:55:08,697 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1542 transitions. Word has length 94 [2023-11-29 06:55:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:08,698 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 1542 transitions. [2023-11-29 06:55:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1542 transitions. [2023-11-29 06:55:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 06:55:08,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:08,699 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:08,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:55:08,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:08,899 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:08,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1189454965, now seen corresponding path program 1 times [2023-11-29 06:55:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:08,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702990939] [2023-11-29 06:55:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:08,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589052294] [2023-11-29 06:55:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:08,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:08,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:08,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:08,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:55:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:08,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:55:08,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 138 proven. 9 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 06:55:09,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:55:09,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:09,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702990939] [2023-11-29 06:55:09,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:09,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589052294] [2023-11-29 06:55:09,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589052294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:09,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:55:09,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 06:55:09,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013736600] [2023-11-29 06:55:09,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:09,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:55:09,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:55:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:55:09,269 INFO L87 Difference]: Start difference. First operand 1111 states and 1542 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 06:55:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:11,374 INFO L93 Difference]: Finished difference Result 3143 states and 4371 transitions. [2023-11-29 06:55:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:55:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 94 [2023-11-29 06:55:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:11,384 INFO L225 Difference]: With dead ends: 3143 [2023-11-29 06:55:11,384 INFO L226 Difference]: Without dead ends: 2566 [2023-11-29 06:55:11,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=879, Invalid=3281, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 06:55:11,387 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1583 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:11,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 1338 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 06:55:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2023-11-29 06:55:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1546. [2023-11-29 06:55:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1258 states have (on average 1.3529411764705883) internal successors, (1702), 1266 states have internal predecessors, (1702), 215 states have call successors, (215), 72 states have call predecessors, (215), 72 states have return successors, (215), 207 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-29 06:55:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2132 transitions. [2023-11-29 06:55:11,662 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2132 transitions. Word has length 94 [2023-11-29 06:55:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:11,662 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 2132 transitions. [2023-11-29 06:55:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 06:55:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2132 transitions. [2023-11-29 06:55:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 06:55:11,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:11,663 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:11,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:55:11,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:11,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1471982518, now seen corresponding path program 1 times [2023-11-29 06:55:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780664865] [2023-11-29 06:55:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:11,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:11,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075381474] [2023-11-29 06:55:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:11,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:11,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:11,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:55:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:11,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:55:11,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:55:18,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:18,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780664865] [2023-11-29 06:55:18,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:18,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075381474] [2023-11-29 06:55:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075381474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:18,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:55:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537525976] [2023-11-29 06:55:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:18,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:55:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:55:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:55:18,468 INFO L87 Difference]: Start difference. First operand 1546 states and 2132 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:30,002 INFO L93 Difference]: Finished difference Result 2287 states and 3189 transitions. [2023-11-29 06:55:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:55:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-29 06:55:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:30,012 INFO L225 Difference]: With dead ends: 2287 [2023-11-29 06:55:30,012 INFO L226 Difference]: Without dead ends: 1850 [2023-11-29 06:55:30,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:55:30,014 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 544 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:30,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 778 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 06:55:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2023-11-29 06:55:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1548. [2023-11-29 06:55:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1260 states have (on average 1.3523809523809525) internal successors, (1704), 1268 states have internal predecessors, (1704), 215 states have call successors, (215), 72 states have call predecessors, (215), 72 states have return successors, (215), 207 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-29 06:55:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2134 transitions. [2023-11-29 06:55:30,268 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2134 transitions. Word has length 94 [2023-11-29 06:55:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:30,269 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 2134 transitions. [2023-11-29 06:55:30,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2134 transitions. [2023-11-29 06:55:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 06:55:30,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:30,270 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:30,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:55:30,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:55:30,470 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:30,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1714049596, now seen corresponding path program 1 times [2023-11-29 06:55:30,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:30,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916802164] [2023-11-29 06:55:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:30,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:30,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146539659] [2023-11-29 06:55:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:30,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:30,482 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:30,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:55:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:30,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:55:30,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:55:36,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:36,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916802164] [2023-11-29 06:55:36,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146539659] [2023-11-29 06:55:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146539659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:36,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:36,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:55:36,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588714610] [2023-11-29 06:55:36,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:55:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:55:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:55:36,106 INFO L87 Difference]: Start difference. First operand 1548 states and 2134 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:47,970 INFO L93 Difference]: Finished difference Result 2623 states and 3665 transitions. [2023-11-29 06:55:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:55:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-29 06:55:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:47,978 INFO L225 Difference]: With dead ends: 2623 [2023-11-29 06:55:47,978 INFO L226 Difference]: Without dead ends: 1868 [2023-11-29 06:55:47,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:55:47,980 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 376 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:47,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 880 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 06:55:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-11-29 06:55:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1562. [2023-11-29 06:55:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1274 states have (on average 1.3532182103610675) internal successors, (1724), 1282 states have internal predecessors, (1724), 215 states have call successors, (215), 72 states have call predecessors, (215), 72 states have return successors, (215), 207 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-29 06:55:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2154 transitions. [2023-11-29 06:55:48,271 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2154 transitions. Word has length 94 [2023-11-29 06:55:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:48,272 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 2154 transitions. [2023-11-29 06:55:48,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:55:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2154 transitions. [2023-11-29 06:55:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 06:55:48,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:48,273 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:48,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:55:48,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:48,473 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:48,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:48,474 INFO L85 PathProgramCache]: Analyzing trace with hash 904702970, now seen corresponding path program 1 times [2023-11-29 06:55:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148851971] [2023-11-29 06:55:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:48,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:48,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313311838] [2023-11-29 06:55:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:48,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:48,485 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:48,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:55:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:48,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:55:48,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 06:55:54,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:54,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148851971] [2023-11-29 06:55:54,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313311838] [2023-11-29 06:55:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313311838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:54,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:54,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:55:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418930438] [2023-11-29 06:55:54,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:55:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:55:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:55:54,143 INFO L87 Difference]: Start difference. First operand 1562 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:56:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:56:06,953 INFO L93 Difference]: Finished difference Result 2603 states and 3637 transitions. [2023-11-29 06:56:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:56:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-29 06:56:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:56:06,961 INFO L225 Difference]: With dead ends: 2603 [2023-11-29 06:56:06,961 INFO L226 Difference]: Without dead ends: 1848 [2023-11-29 06:56:06,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:56:06,963 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 390 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:56:06,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 818 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 06:56:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2023-11-29 06:56:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1564. [2023-11-29 06:56:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1276 states have (on average 1.3526645768025078) internal successors, (1726), 1284 states have internal predecessors, (1726), 215 states have call successors, (215), 72 states have call predecessors, (215), 72 states have return successors, (215), 207 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-29 06:56:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2156 transitions. [2023-11-29 06:56:07,224 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2156 transitions. Word has length 94 [2023-11-29 06:56:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:56:07,225 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2156 transitions. [2023-11-29 06:56:07,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 06:56:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2156 transitions. [2023-11-29 06:56:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 06:56:07,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:56:07,226 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:07,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:56:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:07,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:56:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 438088529, now seen corresponding path program 1 times [2023-11-29 06:56:07,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:07,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491921830] [2023-11-29 06:56:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:07,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:56:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968362919] [2023-11-29 06:56:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:07,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:07,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:07,438 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d05597-1e93-4c86-a6d3-d6e576ff4f8f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:56:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:07,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 06:56:07,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:57:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 06:57:48,690 INFO L327 TraceCheckSpWp]: Computing backward predicates...